<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- 讲师列表 开始 -->
    <section class="container">
      <header class="comm-title all-teacher-title">
        <h2 class="fl tac">
          <span class="c-333">全部讲师</span>
        </h2>
        <section class="c-tab-title">
          <a id="subjectAll" title="全部" href="#">全部</a>
          <!-- <c:forEach var="subject" items="${subjectList }">
                            <a id="${subject.subjectId}" title="${subject.subjectName }" href="javascript:void(0)" onclick="submitForm(${subject.subjectId})">${subject.subjectName }</a>
          </c:forEach>-->
        </section>
      </header>
      <section class="c-sort-box unBr">
        <div>
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="teachers.total==0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article class="i-teacher-list">
            <ul class="of">
              <li v-for="teacher in teachers.items" :key="teacher.id">
                <section class="i-teach-wrap">
                  <div class="i-teach-pic">
                    <a :href="'/teacher/'+teacher.id" :title="teacher.name">
                      <img :src="teacher.avatar" :alt="teacher.name">
                    </a>
                  </div>
                  <div class="mt10 hLh30 txtOf tac">
                    <a :href="'/teacher/'+teacher.id" :title="teacher.name" class="fsize18 c-666">{{teacher.name}}</a>
                  </div>
                  <div class="hLh30 txtOf tac">
                    <span class="fsize14 c-999">{{teacher.intro}}</span>
                  </div>
                  <div class="mt15 i-q-txt">
                    <p class="c-999 f-fA">{{teacher.career}}</p>
                  </div>
                </section>
              </li>
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{undisable: !teachers.hasPrevious}"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)">首</a>
            <a
              :class="{undisable: !teachers.hasPrevious}"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(teachers.current-1)">&lt;</a>
            <a
              v-for="page in teachers.pages"
              :key="page"
              :class="{current: teachers.current == page, undisable: teachers.current == page}"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
              :class="{undisable: !teachers.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(teachers.current+1)">&gt;</a>
            <a
              :class="{undisable: !teachers.hasNext}"
              href="#"
              title="末页"
              @click.prevent="gotoPage(teachers.pages)">末</a>
            <div class="clear"/>
          </div>
        </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /讲师列表 结束 -->
  </div>
</template>
<script>

  import teacherApi from '@/api/teacher'

  export default {

    // 异步调用，只在页面加载完毕后调用一次
    asyncData({params, error}) {
      // 构建分页对象
      let page={
        "current": 1,
        "limit": 8
      };
      return teacherApi.selectTeachersForFront(page)
        .then(res => {
          if(res.data.code==200) {
            return {
              "teachers": res.data.data
            }
          }else {
            this.$message.error(res.data.message);
          }
        });
    },
    methods: {
      // 跳转页动作
      gotoPage(page) {
        // 当page<=0或page>=pages时，提示
        if(page<=0) {
          this.$message.error("当前为第 1 页");
          return ;
        }else if(page>this.teachers.pages) {
          this.$message.error("当前为最后 1 页");
          return ;
        }
        // 构建分页对象
        let p={
          "current": page,
          "limit": 8
        };
        teacherApi.selectTeachersForFront(p)
          .then(res => {
            if(res.data.code==200) {
              this.teachers=res.data.data;
            }else {
              this.$message.error(res.data.message);
            }
          });
      }
    }

  }

</script>
